12222112218 has 32 divisors (see below), whose sum is σ = 25065512640. Its totient is φ = 3970688640.

The previous prime is 12222112211. The next prime is 12222112219. The reversal of 12222112218 is 81221122221.

It is not an unprimeable number, because it can be changed into a prime (12222112211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226296 + ... + 275052.

It is an arithmetic number, because the mean of its divisors is an integer number (783297270).

Almost surely, 2^12222112218 is an apocalyptic number.

12222112218 is an abundant number, since it is smaller than the sum of its proper divisors (12843400422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12222112218 is a wasteful number, since it uses less digits than its factorization.

12222112218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49822.

The product of its digits is 512, while the sum is 24.

Adding to 12222112218 its reverse (81221122221), we get a palindrome (93443234439).

The spelling of 12222112218 in words is "twelve billion, two hundred twenty-two million, one hundred twelve thousand, two hundred eighteen".